Kent · England
Window Mastic in Betsham
Mastic around window and door frames, sills and patio doors in Betsham, with a 12-month guarantee on every job. Ask us for a quote.
- Gaps left after new windows were fitted
- Whistling draughts around closed windows
- White mastic on grey or black frames
Your questions about window mastic in Betsham
Can you do window mastic in Betsham?
Yes. We work across London and the South East, and Betsham is part of that. You can call 0345 464 0079 or email us and tell us what needs doing.
Is Betsham within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
How long should I leave it?
That depends on the sealant used, so please follow the time we give you.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
Do you guarantee window mastic?
Yes, with our one-year guarantee. A yearly look at the joints helps them last.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do the sealants smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
About our window mastic in Betsham
Homes in Betsham have every kind of window: from uPVC casements to timber and aluminium, along with patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. Common call-outs are for cracked internal joints between frame and plaster and cracked or shrunken mastic around the frame, on timber windows & doors, patio & French doors and uPVC windows.
Somewhere as small as Betsham, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Betsham (DA13)
- Region
- Kent
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Also near Betsham
Also in Betsham
How the visit works
There’s no need to move everything out, just the space around the work. We protect the rest, and the job takes a few hours for a few frames, or a day or more for a whole house in most cases. For a village or hamlet like Betsham, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
- Tell us about any water getting in
How to get a quote
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Advice
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Keep jet washers away from the mastic
- Paint up to the joint, not over it
- Keep solvents and bleach off the sealant
- Wipe condensation off the frames
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Water trapped behind a failed joint can start rot in timber frames and sills. Once wood has rotted, it needs repair before it can be sealed, so early resealing is worth it.
DIY versus a professional finish
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
What window mastic looks like in Betsham
With historic houses such as Cobham College (about 4.4 miles south-east) nearby, there’s older building stock in the area around Betsham as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Sedley's Church of England Voluntary Aided Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. Rented homes near Longfield station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Betsham is about 2 miles south-west of Northfleet, in Kent. Across the DA13 area, our applicators can take on window mastic. Betsham is one of 922 towns and villages in Kent we cover. For nearby work, see our London page.
All of DA13 is within our area for window mastic. We cover properties on Station Road, Crayburne and Park Corner Road. With the B262 close by, Betsham is easy for our applicators to reach for window mastic. We also cover Hook Green (1 mile south-east), Southfleet (1 mile south-east), Springhead (1 mile north-east), Ebbsfleet Valley (1 mile north) and Northfleet Green (1 mile east). Larger places within reach include Maidstone (14 miles south-east), Dartford (4 miles north-west), Sevenoaks (11 miles south-west), Gravesend (3 miles east), Tonbridge (15 miles south) and Swanley (6 miles west).
Local landmarks in Betsham
We work in homes and buildings around Beacon Wood Country Park, The Ebbsfleet Academy and The Ship Inn, among other places. The closest station to Betsham is Longfield station, roughly 1.7 miles south. Well-known places in the area include Darent Valley Hospital (2.4 miles north-west) and Stone Castle (2.1 miles north-west). Not far away are Chafford Gorges Nature Park and Sawyers Lake.
Different surfaces, different methods
Composite doors
Front doors take the weather head on. We pay most attention there.
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We’ll tell you which suits your home.
What happens if it’s left?
If you are painting or rendering, reseal at the same time. Fresh joints finish the job neatly. Older cottages and farmhouses around Betsham can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first and send you a clear quote before any work starts.
Why us?
- Over 20 years’ experience
- Sanitary silicone with an anti-fungal additive in wet areas
- Experience in homes, commercial sites and hotels
- You choose the colour before work begins
Read what affects the cost and what customers say.
What we are called out for in Betsham
Mastic ages in the weather. Sunlight dries the surface out, until it loses its stretch and starts to crack.
People usually contact us after spotting one of these:
- Mastic that has split away from the wall
- A bead that doesn’t match the frame
- Gaps between the frame and the inside reveal
- Untidy mastic left by window fitters
Homes close to Church of St Nicholas include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What your quote should include
- Are they insured?
- What happens if the job turns out different
- Who turns up on the day
- How the surfaces are prepared before sealing
What affects the cost of window mastic
Your quote is based on your job. We take into account:
- When we can work, for business premises
- How many rooms, windows or areas are involved
- Mould in or behind the old joints
- Which sealant suits the joint
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
You don’t need to know the technical terms. Just tell us:
- Where the property is
- What the problem is, such as mould, gaps, leaks or cracking
- Any previous sealing or DIY work
- Photos by email, if that is easy
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved.